import pandas as pd

f = pd.read_csv('result2.csv', encoding='utf-8')
# s = f['educational_requirement'].isnull()
most = f['educational_requirement'].value_counts().index[0]
ans = f.fillna({'educational_requirement': most})
# print(ans[s]['educational_requirement'])
ans.to_csv('result3.csv', encoding='utf-8', index=0)
